* Upgrade gpu build to CUDA 10 + cudnn 7.3
* update the yaml file for python package building
* switch to the cuda9.1 docker file if the CUDA_VER is cuda9.1-cudnn7.1
* Imlpement StringNormalizer
Add mixed language tests, test case insentive path.
* Create a locale on the fly. Default locale does not seem to create well.
* Add CI language-pack-en to make default locale available.
Catch and translate locale creation exception to make the message
meaningful.
* Make sure locales are configured on Ubuntu.
* Add pipeline for building python wheels for Windows/Linux CPU and GPU
* try enable mkldnn
* remove mklml
* Update python packaging configuration
* Add python3.7 support
* Revert to disable the py37 packaging on windows